HYB514256B-50 SIEMENS [Siemens Semiconductor Group], HYB514256B-50 Datasheet - Page 20

• Manufacturer Part Number: HYB514256B-50
• Description: 256 K x 4-Bit Dynamic RAM Low Power 256 K x 4-Bit Dynamic RAM
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Hidden Refresh Cycle (Read)
Semiconductor Group
A0-A8
RAS
I/O1-I/O4
(Outputs)
OE
CAS
WE
I/O1-I/O4
(Inputs)
V
V
V OL
V IL
V
V
V
V
V IL
V IL
V
V IL
V IL
V IL
OH
IH
IH
IH
IH
IH
IH
t
ASR
Addr
Row
“H” or “L”
t
RAH
t
RAD
t
RCS
t
t
DZC
RCD
t
t
Address
RAC
Column
t
DZO
t
ASC
RAS
t
t
t
AA
CAH
CAC
t
RC
t
t
RSH
OEA
t
CLZ
t
74
RRH
t
RP
HYB 514256B/BL/BJ/BJL-50/-60/-70
Valid Data Out
t
WRP
t
WRH
t
CHR
t
RAS
t
t
OEZ
RC
t
ODD
t
OFF
t
CDD
256 K
t
CRP
t
t
RP
ASR
HI-Z
Address
4-DRAM
Row